Concrete construction.



' S. J. SPROL.

CONCRETE cowsmucnom APPLICATION FILED JUNE 19, 19141 Pat ents d Jam-4, 1916.

3 SHEETS-SHEET 1 S. I. SPBOL.

CONCRETE CONSTRUCTION. I APPLICATION FILED JUNE 19. .1914.

3 SHEETS-SHEET 3.

'n 'nrrnp s'rai'rns rarnu'r seamen SAMUEL J. srnon, or BALTIMOREMABYLAND.

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To all whom it may concern Be it known that I, SAMUEL Simon, a citizen of the .United States, residing at Baltimore city, State of Maryland, have invented certain new and useful Improve- ,ments in Concrete Constructions, of Which the following is a specification.

This invention relates to reinforced con: crete constructions and has for. its Object to produce slab, system with a circular bracket head.

So far as I am aware there has not been proposed a system of reinforced concrete building construction which gives aflat seamless slab floor construction with the use of a circular bracket head. The present flat slab systems cannot be computed with the ordinary formulas and the result has been to make it very diflicult to obtain the proper and correct stress.

To overcome this difficulty is the object of this invention and with this object in view the invention consists in the improved construction, arrangement and combination of parts which will be hereinafter fully described and afterward specifically claimed.

In order that the construction and operation thereof may be readily comprehended, I have illustrated an approved embodiment, of my invention in the accompanying drawings and will now proceed tofully and specifically describe the invention, having reference to said drawings, in which- Figure 1 represents a plan view of the horizontal reinforcing members in my improved fiat slab floor construction, Fig. 2, a plan view of the reinforcing members of one pillar of a form which I use in my syson the plane 1n-- tem, Fig. 3, a section view dicated by the broken line 33 in Fig. 1, and Fig. l, a vertical view on the plane indicated by the broken line of Fig. 2.

Like reference characters indicate the same parts wherever they appear in a 'plurality of the figures of the drawings.

My structure comprises load-sustaining columns arranged in suitable series either parallel or crossing, of which I have only deemed it necessary to illustrate two, indicated at 5, 6, in Figs. 3 and 4. Each of these columns is provided, at its upper or load-receiving end, with a circular, flaring, or inverted conical head or bracket .7 upon the top of which, and formed integral therewith, are what I term the slabs 8. These slabs, always'integral Specification of Letters Patent.

what is known in the art as a flat at right angles.

a plurality of tion and forming floors, covering all of the spaces between the columns.

g The metallic reinforcing rods are formed as follows There are a number of series of horizontal reinforcing rodsl9, 10 as shown. in the floor slabs in Figs. 3 and 4. and detached from the slabs or floors in Figs. 1

and 2, the rods 9 running parallel with the slabs and the rods 10, crossing the rods 9 Above the rods 9 and 10 are diagonal series of rods 11, 12 shown in Figs. 1 and 2, detached from'the concrete, and vin Fig. 3, in the concrete, which rods 11, 12 are above the rods 9, 10 and cross them diagonally, the rods 12 being above the rods 11. The two series of rods 9, 10,

and 11, 1.2, cross each other above the columns, as shown in Fig. 1, and in each series,

the rods lap each other, as shown at various places in Figs. 1 and 2, and the ends of the rods 9 and 10, at their lapping points are turned downward, into the concrete, as at 13in Fig; '3 which tends to hold them against endwise stress. Any of the horizontally arranged reinforcing rodsmay be trussed as shown in Figs; 3 and 4:. I

In each column is a spirally coiled reinforcing rod laps a pair 1 1-, the upper coil of which overof adjacent rods.9 and within. this spiral rod 14 area plurality of vertical Pat'entedJ an. 4,1916. AppIicationfiI edQI-une19,1914: seri mdeiams. r i

rods 15 which may be turned back into the concrete in the top slab'orfloor construction, butwhich will extend through as many columns as may be placed upon each other,

the ends of said rods'being shown extended above the slab or floor structure in Fig. 4.

Reinforcing brackets extending radially fromthe reinforcements of columns are provided to reinforce the heads of the columns.

These bra ckets are made of rods and each are bent to form the horizontalportions 16 I and 18 connected by the vertical portion H 17, ends ofthe portions 16 and 19 engage the vertical reinforcements of the column and the said ends of the portion 16 are bent downwardly to form books which prevent their displacement, as clearly shown in Fig. 4: of the drawings.

Having thus fully described my invention what I claim as new and desire to se and the inclined portion 19. The inner cure by Letters Patent of the United States is:

A reinforced concrete construction, comprising a flat floor slab and integral supporting columns having heads at their upper ends horizontal reinforcing rods in said floor slab, each of which extends from column to column and across the vertical axis of the columns and with their ends terminating and anchored within the periph eral contour of said heads, vertical reinforcing rods in said columns, a spiral reinforcement around said vertical. rods, and a plurality of radially extending triangular brackets secured to said column reinforce ments, the horizontal, portions of said brackets having inner bent ends to engage said column reinforcement and said horizontal portions together with the column reinforcements forming continuous tension members in the slab above the column heads and below the terminals of said horizontal reinforcingrods, and the inclined portions of said brackets being projected below said floor slab and serving as reinforcements for said column heads.

In testimony whereof I afiix my signature in presence of two witnesses.

. SAMUEL J. SPROL. Witnesses E. WA TON BREWINGTON, HOWARD D. ADAMS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

